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(No Model.) 4Shmats--8heetv 1. W. H. EGKERT & J. A. SEELY.

POLICE TELEPHONE SYSTEM.

' Patented Jilly 5, 1887.

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(No Modei.) 4 Sheets-Sheet 2. 'W. H. ECKERT 8v J. A. SEELY.

I POLIGE TELEPHONHSYSTEM. 1

No. 365,911. Patented July 5, 1887.

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(No Model.) I 4 SheeEs-Sheet L3, W. H. EOKERT 81; J. A. SEEL'Y.

, POLICE TELEPHONE SYSTEM.

No. 365,911. Patented July 5, 1887.

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POLICE TELEPHONE, SYSTEM.

Pat nted July 5, 1887.

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W'ILLIAMII. EOKERT AND JOHN A. SEELY, OF NEW YORK, N. Y.

POLICE-=TELEPHONE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 365,911, dated July 5. 1857- Application filed August 28, 1886. Serial No. 212,060. (No model.)

To all whom it may concern:

Beit known that we, WILLIA H. Eonnnr, and "JOHN A. SEELY, citizens of the United States, and residents of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Police-Telephone Systems, of which the following is a complete, clear, and exact description, setting forth in general and in detail our invention.

Qur invention relates to a system whereby policemen throughout a city may be communicated with telephonically.

The object is to provide a system composed of elements which are simple of construction and not liable to get out of order. The system is composed of a central station termed the police-headquarters, sub-stations termed police-stations, and sub stations termed posts or policemens boxes. The first two kinds of stations are te'lephonically conncctedin the usual manner. Thelatter two are connected and adapted to operate in the manner as more fully hereinafter described.

In order to illustrate the practical manner of carrying out the invention, drawings are hereunto annexed and described, in which similar letters of reference represent corresponding elements, and in which each part referrred to is designated by a single letter.

Figure 1 is a front view of one of the boxes located at the several posts. The door is shown open. Parts are shown in dotted lines to indicate that they are located behind a frame or support or secondary door hinged at the top to the box. Fig. 2 is a view of the same box,

the said secondary cover being entirely removed to exhibit the elements inside. Figs. 3, 4L, 5, and 6 are diagrammatical representations of the elements of the system, showing especially the electric circuits andconnections. Fig. 7 is a ground or birds-eye view of the police-headquarters, police-station, and posts, the same being connected electrically. Fig. 8 is a front elevation of some of the posts or policemens boxes in electrical connection and electrically connected to a policestation.

Referring particularly to Figs. 3, 4, 5, and 6, there is a police or sub station containing apparatus shown in Figs. 4., 5, and 6 and the lower part of Fig. 3, and any number (two are shown in the drawings) of posts or policeboxes A and B. (Shown in Fig. 3.) The system consists of the combination of a magneto electric bell, 0, having crank D and earthcon nection E, an electrical indicator in circuit with said magneto-boll, and consisting of a magnet, F, a notched wheel, G, normally tending to rotate under the influence of a weight, H, suspended from a cord wound upon its shaft I, and a pivoted armature, J, normally pressing in the notches of said wheel, the pressure being produced by the spring K, and being adjacent to said magnet, a plug, L, in circuit with said indicator, a spring-jack, M, for receiving said plug, and a circuit passing from said plug through said spring-jack to an indieator in the first post, said indicator being identical to the first-described indicator at the police-station, except that one of the projections, N, on the notched wheels G is of metal or conducting material, while the rest, 0, are of insulating material, and that there are two terminals, P and Q, normally open and pressing upon the notched wheel. The circuit then passes through a similar indicator at the next post, and then to ground at E. The said terminals 1? and Q and P and Q] are in branch circuits It and It, respectively, and normally open. Each includes anysuitable annunciator, S. At each'post are a switch and telephonic apparatus adapted to be thrown into the main circuit T by the switch, consisting of the combination of two terminals, U and V, in the main circuit, two terminals, V and X, in circuit with the telephonic apparatus Y, and a conducting-plug, Z, rigidly and mechanically connected with, but electrically insulated from, said latter terminals, and normally electrically in contact I with the former terminals.

Fig. 5 shows the telephonic apparatus at the police-station. It is electrically connected to the plug L, which is adapted to be inserted in the spring-jack M. \Vhen the terminals V and Z and NV and V are in contact, and the plug L is forced into the spring-jack M, telephonic communication is established between the police-station and the post at which the said terminals are brought in contact. The

indicators all have hands or pointers a,which remain in permanent positions, and each of the notched wheels have the same number of projections and as many projections as there are posts. That wheel G at the police-station has no. electrical connections, so that all the projections may be of insulating or conducting substances; ,but in order to operate properly, each of the wheels G and G at the posts has one of the projections of metal, and, further, these metal projections are one ahead of the other in the successive posts. Thus, as shown, the projection N is one space ahead of the projection N.

bis alightning-arrester of usual construction.

Referring more particularly to Figs. 1 and 2, which are different views of the box at any policeman s station, many of the parts in Fig. 3 are repeated herein, as may be observed by noticing the characters of reference, which represent like parts in every instance. Additionally, the mechanism for generating the current in the telephonic apparatus is shown,

but 'not fully described, in this application, as it has no necessary operation with the invention at present in hand.

Referring particularly to Figs. 7 and 8, the parts are named mostly upon the drawings as headquarters, trunkwires/ police-stationsfland posts 1, 2, 3, 4, 5 upon circuits E, passing out from the various police-stations. I

t is a portional sectional view of a building adapted to contain the instruments of any p0 lice-station, and g are outside views of some of the police-boxes mounted upon post it.

The modes opcrandz' between the police-station and a postsay post B-is given below. If the operator at the police-station desires to notify the policeman at post 13 that he is wanted, he picks up plug L and inserts itinto the spring-jack M. He then sends an electrical impulse over the line by turning the crank D of the magneto-bell O. The momentary current of electricity energizes the magnets F, F, and F which raise the armatures J, J, and J which in turn allowthe wheel to rotate until the armatures fall into notches numbered in each unity or 1. The same operation is repeated, except that while the armatures are passing along the projections-i. e., are between the notches-at second pulsation or momentary current is transmitted over the line by the same means mentioned above. The terminals P thus become electricallyclosed by the projections N, allowing the current to pass through the annunciator S,which operates in the well known manner. The policeman at post 13 thus becomes aware that he is wanted. The annunciator S did not opcrate during the first operation, because no pulsation of current was transmitted while the projection N was passing along in contact with the armature J, but only while the said lever was being lifted from the notch directly adjacent to the projection N. When the annunciator S has operated, the said operator sends pulsations over the line until the wheels are again brought into their normal position operator becomes aware of what post he is calling, because his indicator acts synchronously with the indicators at the several posts. After the policeman has become aware that he is called and has set hisannunciator, by hand or in any suitable manner, he makes telephonic eommunieationwith the police-station by bringing the terminals X and U togetl ili',

and also terminals W and Z together. policeman and operator hold conversat1on, the latter previously inserting plug L in sprlng jack M.

It should be understood that we do not con fine ourselves to the exact construction hereinbefore set forth, but that we are entitled to all the devices whose nature conforms to that of the particular'm'cans set forth.

Having now stated the object of the saidinvention, having described its practical reahza tion by reference to the accompanying draw ings, and having particularly ascortalned the manner in which the same operates to accomplish the said object, what we claim 1s- 1. In a police-telephone system, a policestation, and police-boxes, the latter being provided with electric indicators each consisting of a wheel having projections and notches upon its periphery, a magnet and its armature, the latter pressing in one of said notches, and all of the projections being of insulating material except one, which is of conducting material,- and a weight or similar operating device geared to said wheel, and the former being provided with a synchronously-operating electric indicator which is in circuit with all the said magnets in said posts, the posts being provided also with annunciators located in shunt-circuits to said magnets,and the said projections of conducting material being one space or projection ahead or in advance of each other on the notched wheels of the successive postindicators, and all indicators having suitable index-hands, as and for the purpose described.

2. In a police-telephone system, the combination of a police-station provided with an electrical indicator consisting of a notched wheel, an index-hand for said notches, mech anism normally tending to rotate said wheel, electric apparatus tending to check said wheel, and consisting of a magnet and its armature, the latter resting in one of the notches in said wheel, the said station being also provided with a magneto-call-bell, and posts or police boxes in circuit with said electric mechanism and with said magneto bell, and provided with indicators in all respects like the above-mentioned indicator except that one of the projections between the notches is of con \Vitness our signaturcs and seals this 31st ducting material while the remaining similar day of July, 1886. projections are of insulating material, that the conducting projections are one in advance in \VILLIAM H. EOKERT. L. s.] i 5 the successive posts, and that there are two J OHN A. SEELY. LL. s.]

terminals of an electric circuit,which includes r an electric annunciator located in a shunt to WVitnesses:

that circuit which passes through said police- AVERY P. EOKERT, station and said posts, substantially as de- EDW'ARD P. THOMPSON. 1o scribed. 

